It's mostly all about relationships between characters, and fitting that into a 5 act structure.
...the problem is that I keep trying to add "Realism" into the mix. I want characters to have relations to one another, but I also want them to have relationships to areas ("This is my home ground", "This is somewhere I'm not liked"), and I want these relationships to evolve in play. In fact, that's one of the important parts to this game and to the plays of the era. Characters grow, relationships change.
But I don't want the final product to become a convoluted mess of systems and subsystems.
Maybe I need to sleep on it again.